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<div class="title">nrf51/Board/nrf6310/spi_master_example/main.c</div>  </div>
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<a href="nrf6310_2spi__master__example_2main_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* Copyright (c) 2009 Nordic Semiconductor. All Rights Reserved.</span>
<a name="l00002"></a>00002 <span class="comment"> *</span>
<a name="l00003"></a>00003 <span class="comment"> * The information contained herein is confidential property of Nordic</span>
<a name="l00004"></a>00004 <span class="comment"> * Semiconductor ASA.Terms and conditions of usage are described in detail</span>
<a name="l00005"></a>00005 <span class="comment"> * in NORDIC SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.</span>
<a name="l00006"></a>00006 <span class="comment"> *</span>
<a name="l00007"></a>00007 <span class="comment"> * Licensees are granted free, non-transferable use of the information. NO</span>
<a name="l00008"></a>00008 <span class="comment"> * WARRANTY of ANY KIND is provided. This heading must NOT be removed from</span>
<a name="l00009"></a>00009 <span class="comment"> * the file.</span>
<a name="l00010"></a>00010 <span class="comment"> *</span>
<a name="l00011"></a>00011 <span class="comment"> */</span>
<a name="l00012"></a>00012 
<a name="l00029"></a>00029 <span class="preprocessor">#include &quot;<a class="code" href="spi__master_8h.html" title="Software controlled SPI Master driver.">spi_master.h</a>&quot;</span>
<a name="l00030"></a>00030 <span class="preprocessor">#include &quot;nrf_delay.h&quot;</span>
<a name="l00031"></a>00031 <span class="preprocessor">#include &quot;common.h&quot;</span>
<a name="l00032"></a>00032 <span class="preprocessor">#include &quot;spi_master_config.h&quot;</span>
<a name="l00033"></a>00033 
<a name="l00034"></a><a class="code" href="group__spi__master__example.html#gab36e6efd0ec4bf8a1f51555850828b5a">00034</a> <span class="keyword">static</span> uint8_t <a class="code" href="group__spi__master__example.html#gab36e6efd0ec4bf8a1f51555850828b5a">tx_data</a>[TX_RX_MSG_LENGTH]; 
<a name="l00035"></a><a class="code" href="group__spi__master__example.html#gae4cee0b144cc6cb01fc4c7b36e37a874">00035</a> <span class="keyword">static</span> uint8_t <a class="code" href="group__spi__master__example.html#gae4cee0b144cc6cb01fc4c7b36e37a874">rx_data</a>[TX_RX_MSG_LENGTH]; 
<a name="l00037"></a><a class="code" href="group__spi__master__example.html#ga70fb43de88d474f4c6e87dff47edf851">00037</a> <span class="preprocessor">#define DELAY_MS               100        </span>
<a name="l00045"></a><a class="code" href="group__spi__master__example.html#gad4d06277ef5012bb818ae4b32eb1b8d2">00045</a> <span class="preprocessor">static bool test_spi_tx_rx(SPIModuleNumber mod_num, uint8_t lsb_first)</span>
<a name="l00046"></a>00046 <span class="preprocessor"></span>{
<a name="l00047"></a>00047   <span class="comment">// Use SPI0, mode0 with lsb shifted as requested</span>
<a name="l00048"></a>00048   uint32_t *spi_base_address = <a class="code" href="group__lib__driver__spi__master.html#gac83edc688197ced911cf822ab3eae81a">spi_master_init</a>(mod_num, <a class="code" href="group__lib__driver__spi__master.html#gga96e7e9bbfca8b326307e8b20ba4706e1aacf2eef6aadb9f0de11862660cd9ade6">SPI_MODE0</a>, (<span class="keywordtype">bool</span>)lsb_first);
<a name="l00049"></a>00049   <span class="keywordflow">if</span> (spi_base_address == 0)
<a name="l00050"></a>00050     <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00051"></a>00051 
<a name="l00052"></a>00052   <span class="comment">// Fill tx_data with some simple pattern, rx is filled with zero&#39;s so that after receiving from</span>
<a name="l00053"></a>00053   <span class="comment">// slave we verify rx_Data is same as tx_data</span>
<a name="l00054"></a>00054   <span class="keywordflow">for</span>(uint8_t i = 0; i &lt; TX_RX_MSG_LENGTH; i++)
<a name="l00055"></a>00055   {
<a name="l00056"></a>00056     <a class="code" href="group__spi__master__example.html#gab36e6efd0ec4bf8a1f51555850828b5a">tx_data</a>[i] = i;
<a name="l00057"></a>00057     <a class="code" href="group__spi__master__example.html#gae4cee0b144cc6cb01fc4c7b36e37a874">rx_data</a>[i] = 0;
<a name="l00058"></a>00058   }
<a name="l00059"></a>00059 
<a name="l00060"></a>00060   <span class="comment">// Transmit TX_RX_MSG_LENGTH bytes from tx_data and receive same number of bytes and data into rx_data</span>
<a name="l00061"></a>00061   <span class="keywordflow">if</span>(!<a class="code" href="group__lib__driver__spi__master.html#ga14655d328261ceeb3c23c73f6ae33980">spi_master_tx_rx</a>(spi_base_address, TX_RX_MSG_LENGTH, (<span class="keyword">const</span> uint8_t *)<a class="code" href="group__spi__master__example.html#gab36e6efd0ec4bf8a1f51555850828b5a">tx_data</a>, <a class="code" href="group__spi__master__example.html#gae4cee0b144cc6cb01fc4c7b36e37a874">rx_data</a>) )
<a name="l00062"></a>00062     <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00063"></a>00063 
<a name="l00064"></a>00064   <span class="comment">// Validate that we got all transmitted bytes back in the exact order</span>
<a name="l00065"></a>00065   <span class="keywordflow">for</span>(uint8_t i = 0; i &lt; TX_RX_MSG_LENGTH; i++)
<a name="l00066"></a>00066   {
<a name="l00067"></a>00067     <span class="keywordflow">if</span>( tx_data[i] != <a class="code" href="group__spi__master__example.html#gae4cee0b144cc6cb01fc4c7b36e37a874">rx_data</a>[i] )
<a name="l00068"></a>00068       <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00069"></a>00069   }
<a name="l00070"></a>00070   <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00071"></a>00071 }
<a name="l00072"></a>00072 
<a name="l00077"></a><a class="code" href="group__spi__master__example.html#ga840291bc02cba5474a4cb46a9b9566fe">00077</a> <span class="keywordtype">int</span> <a class="code" href="group__gpio__example.html#ga840291bc02cba5474a4cb46a9b9566fe">main</a>(<span class="keywordtype">void</span>)
<a name="l00078"></a>00078 {
<a name="l00079"></a>00079   <span class="keywordtype">bool</span> ret0, ret1;
<a name="l00080"></a>00080 
<a name="l00081"></a>00081   NRF_GPIO-&gt;DIRSET = (1UL &lt;&lt; ERROR_PIN_SPI0);
<a name="l00082"></a>00082   NRF_GPIO-&gt;DIRSET = (1UL &lt;&lt; ERROR_PIN_SPI1);
<a name="l00083"></a>00083   <span class="keywordflow">while</span>(<span class="keyword">true</span>)
<a name="l00084"></a>00084   {
<a name="l00085"></a>00085     <span class="comment">// SPI0</span>
<a name="l00086"></a>00086     ret0 = <a class="code" href="group__spi__master__example.html#gad4d06277ef5012bb818ae4b32eb1b8d2">test_spi_tx_rx</a>(<a class="code" href="group__lib__driver__spi__master.html#ggac859abd9dbf0e642ef29753f142f4475a7add1e0588a075d9385b10fcbb2010f4">SPI0</a>, 1 );   
<a name="l00087"></a>00087     <span class="keywordflow">if</span> (ret0)
<a name="l00088"></a>00088     {
<a name="l00089"></a>00089       <span class="comment">// previous tx/rx was successful with lsb shifted first, try the same with lsb shifted last</span>
<a name="l00090"></a>00090       nrf_delay_ms(<a class="code" href="group__spi__master__example.html#ga70fb43de88d474f4c6e87dff47edf851">DELAY_MS</a>);   
<a name="l00091"></a>00091       ret0 = <a class="code" href="group__spi__master__example.html#gad4d06277ef5012bb818ae4b32eb1b8d2">test_spi_tx_rx</a>(<a class="code" href="group__lib__driver__spi__master.html#ggac859abd9dbf0e642ef29753f142f4475a7add1e0588a075d9385b10fcbb2010f4">SPI0</a>, 0 );
<a name="l00092"></a>00092     }
<a name="l00093"></a>00093 
<a name="l00094"></a>00094     <span class="keywordflow">if</span> (!ret0)
<a name="l00095"></a>00095     {
<a name="l00096"></a>00096       <span class="comment">// Set gpio pin number ERROR_PIN to convey error, this pin can be connected to LED for visual debug</span>
<a name="l00097"></a>00097       NRF_GPIO-&gt;OUTSET = (1UL &lt;&lt; ERROR_PIN_SPI0);
<a name="l00098"></a>00098     }
<a name="l00099"></a>00099 
<a name="l00100"></a>00100     <span class="comment">// SPI1</span>
<a name="l00101"></a>00101     ret1 = <a class="code" href="group__spi__master__example.html#gad4d06277ef5012bb818ae4b32eb1b8d2">test_spi_tx_rx</a>(<a class="code" href="group__lib__driver__spi__master.html#ggac859abd9dbf0e642ef29753f142f4475add83ddb396fbcb33f2d61248e5c4a185">SPI1</a>, 1 );   
<a name="l00102"></a>00102     <span class="keywordflow">if</span> (ret1)
<a name="l00103"></a>00103     {
<a name="l00104"></a>00104       <span class="comment">// previous tx/rx was successful with lsb shifted first, try the same with lsb shifted last</span>
<a name="l00105"></a>00105       nrf_delay_ms(<a class="code" href="group__spi__master__example.html#ga70fb43de88d474f4c6e87dff47edf851">DELAY_MS</a>);   
<a name="l00106"></a>00106       ret1 = <a class="code" href="group__spi__master__example.html#gad4d06277ef5012bb818ae4b32eb1b8d2">test_spi_tx_rx</a>(<a class="code" href="group__lib__driver__spi__master.html#ggac859abd9dbf0e642ef29753f142f4475add83ddb396fbcb33f2d61248e5c4a185">SPI1</a>, 0 );
<a name="l00107"></a>00107     }
<a name="l00108"></a>00108 
<a name="l00109"></a>00109     <span class="keywordflow">if</span> (!ret1)
<a name="l00110"></a>00110     {
<a name="l00111"></a>00111       <span class="comment">// Set gpio pin number ERROR_PIN to convey error, this pin can be connected to LED for visual debug</span>
<a name="l00112"></a>00112       NRF_GPIO-&gt;OUTSET = (1UL &lt;&lt; ERROR_PIN_SPI1);
<a name="l00113"></a>00113     }
<a name="l00114"></a>00114 
<a name="l00115"></a>00115     <span class="keywordflow">if</span> (!ret0 &amp;&amp; !ret1 )
<a name="l00116"></a>00116     {
<a name="l00117"></a>00117       <span class="keywordflow">while</span>(<span class="keyword">true</span>)
<a name="l00118"></a>00118       {
<a name="l00119"></a>00119           <span class="comment">// Loop forever</span>
<a name="l00120"></a>00120       }
<a name="l00121"></a>00121     }
<a name="l00122"></a>00122   }
<a name="l00123"></a>00123 }
<a name="l00124"></a>00124 
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